A dual-band RCS reduction of Fabry-Perot antenna based on polarization conversion metasurface

Radar cross section (RCS) is an important parameter of representing target recognition in radar detection technology, stealth and anti-stealth technology. As the antenna has a crucial impact on RCS, reducing the RCS of antenna system has become a key research subject in stealth technology, but the current scheme affect the radiation performance of the antenna while reducing the RCS. In this paper, a dual-band RCS reduction and gain enhancement antenna is designed by combining polarization conversion metasurfaces with Fabry-Perot resonator antenna. The simulation results show that the maximum RCS reduction of the antenna is 15 dBsm at 4−9 GHz and 12−15 GHz. In addition, the gain of Fabry-Perot antenna is 7 dBi higher than that of feed antenna. The antenna has the characteristics of high gain and low RCS, which provides a novel way for the design of Fabry-Perot resonator antenna.